matrixAttributeBaseName.js

const getBaseDescription = async() =>{

    const baseURL = window.location.origin 

    const [accountID, itemID] = window.location.href.match(/\d+/g)

    const descriptionNode = document.querySelector('.description')

    const currentItemURL =  `${baseURL}/API/Account/${accountID}/Item/${itemID}.json?load_relations=["ItemAttributes","ItemAttributes.ItemAttributeSet"]`

    const itemResponse = await fetch(currentItemURL, { credentials:'same-origin'});

    const itemJSON = await itemResponse.json();

    const description = itemJSON.Item.description

            if(Number(itemJSON.Item.itemMatrixID) > 0){
                const attributes = itemJSON.Item.ItemAttributes

               const matrixAttributeString = Object.keys(attributes).reduce((matrixString, currentkey, index)=>{
                    if(index < 3){
                        if(attributes[currentkey] !== ""){
                            return index === 0 ?`${matrixString}${attributes[currentkey]}`:`${matrixString} ${attributes[currentkey]}`
                        }
                    }
                    return matrixString
                },"")
                
             const baseItemDescription = description.replace(new RegExp(matrixAttributeString, "g"), "")

             descriptionNode.innerText = baseItemDescription

            }


}